Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Product	$ 11,358	$ 0	$ 11,358	$ 5,240
Service	721	298	2,408	813
Distribution rights	118	59	356	59
Total revenue	12,197	357	14,122	6,112
Cost of revenue:
Product	9,728	803	10,322	6,869
Service	484	380	1,758	1,705
Total cost of revenue	10,212	1,183	12,080	8,574
Gross margin	1,985	(826)	2,042	(2,462)
Operating expenses:
Research and development	3,616	2,654	9,781	9,017
Selling and marketing	2,510	1,570	5,453	4,251
General and administrative	7,502	5,829	22,116	17,937
Total operating expenses	13,628	10,053	37,350	31,205
Loss from operations	(11,643)	(10,879)	(35,308)	(33,667)
Interest income	1	1	3	2
Interest expense	(1,843)	(1,707)	(5,372)	(4,166)
Other income (expense), net	2,269	(1,561)	(6,853)	(1,798)
Loss before provision for income taxes	(11,216)	(14,146)	(47,530)	(39,629)
Provision for income taxes	0	0	0	0
Net loss	$ (11,216)	$ (14,146)	$ (47,530)	$ (39,629)
Net loss per share, basic and diluted	$ (0.19)	$ (0.35)	$ (0.85)	$ (1.02)
Weighted-average common shares used to compute net loss per share attributable to common stockholders, basic and diluted	59,061,149	40,156,851	56,064,562	38,915,156